<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
</head>

<body>
    <button id="btn">修改vDOM,并重新渲染</button>
    <div id="app"></div>
    <script type="text/babel">
        const arr = ["html", "css", "js", "jq"]
        const vDOM = (
            <ul>
                {
                    arr.map(item => (<li>{item}<input type="text" /></li>))
                }
            </ul>
        )
        const root = ReactDOM.createRoot(document.getElementById('app'));
        root.render(vDOM)

        //给按钮绑定点击事件,修改数据 然后重新得到新的vDOM 重新渲染
        const oBtn = document.getElementById('btn');
        let i = 0;
        oBtn.onclick = function () {
            // let i = 0;//永远都是0
            arr.unshift("react" + i++);
            console.log(i);
            const vDOM = (
                <ul>
                    {
                        arr.map(item => (<li>{item} <input type="text" /></li>))
                    }
                </ul>
            )
            root.render(vDOM)
        }



    </script>
</body>

</html>